No test found

[pcorbineau]

Describe the bug
neotest-zig not working. It looks like he doesn't find my test.

Steps To Reproduce

foo.zig

const std = @import("std");

test "basic tests" {
    const expected: u32 = 4;
    try std.testing.expectEqual(expected, 2 + 2);
}

build.zig

const std = @import("std");

pub fn build(b: *std.Build) !void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});

    const test_step = b.step("test", "run unit tests");

    const unit_tests = b.addTest(.{
        .root_source_file = b.path("foo.zig"),
        .target = target,
        .optimize = optimize,
    });

    const run_unit_tests = b.addRunArtifact(unit_tests);
    test_step.dependOn(&run_unit_tests.step);
}

Run neotest

Current behavior

Loading for few seconds :

Then stucks with this :

Expected behavior

Expect a green or red test result

Logs

neotest-zig.log

Environment

• OS: Windows
• Zig version: 0.13.0
• Nvim version: NVIM v0.10.2
• Neotest version: 5.8.0
• Neotest Zig version: 1.3.1

Additional context

zig setup seems working since if I dont provide a build.zig with a test step, I got a red test result with appropriate stdout.

** I'm new to zig toolchain so I probably miss something **

zig build test works

[lawrence-laz]

Could not reproduce on linux:

Unfortunately, I don't have a windows machine to test on.

Looking at the logs you attached, it seems like things are going as expected up until the test is executed, i. e. the build.zig file is recognized, the test is found in foo.zig, but the result file is empty:

[TRACE][2025-01-28 13:07:40] ...est-zig/init.lua:509	"Found a "	"file"	"named"	"16256753171039001766"	"in results dir"
[TRACE][2025-01-28 13:07:40] ...est-zig/init.lua:518	"Trying to open results file"	"C:/Users/PCORBI~1/AppData/Local/Temp/nvim.0/npcv3A/2/16256753171039001766"
[TRACE][2025-01-28 13:07:40] ...est-zig/init.lua:527	"Decoded JSON"	{}

Notice the "Decoded JSON" {} part showing an empty object.

Which leads me to believe, that the issue is probably in neotest_runner.zig file, which is responsible for running the tests and writing out the results into a temporary json file.

[pcorbineau]

As I said, I was trying the plugin while discovering zig in same time. For now, I don't need it. We should let this ticket open if someone else have same issue or if I want to dig into later 👍